16,119 questions with Exchange-related tags

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Custom domain removed from source tenant but still remains as Exchange Online accepted domain

Hello, I need help with a custom domain that appears to be stuck in Exchange Online after being removed from the source tenant. Domain: example.com Issue summary The domain example.com was previously hosted in an old Microsoft 365 tenant and has now been…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-19T16:10:44.2633333+00:00
Jabulani Motloung 231 Reputation points
answered 2026-04-19T16:11:11.47+00:00
Q&A Assist
1 answer One of the answers was accepted by the question author.

Export-ExchangeCertificate now returns “The operation is not supported”

After updating our SE server, Export-ExchangeCertificate now returns “The operation is not supported” when exporting the OAuth certificate, even though it’s marked exportable and permissions are correct. This breaks our DR scripts across all…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,149 questions
asked 2026-04-19T09:21:00.9066667+00:00
Diermeier Lamaralus 160 Reputation points
accepted 2026-04-19T13:54:34.8433333+00:00
Diermeier Lamaralus 160 Reputation points
0 answers

I was intending to purchase fc26 point but bought fc24

I recently purchased fc points for my fifa game on xbox but I was intending to purchase fc26 points but I purchase fc24 points ..... I haven't used them as I do not have the game fc24, is there any way they can be swapped as they are the same price and I…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-19T01:04:51.2666667+00:00
stephen nelson 0 Reputation points
commented 2026-04-19T01:34:22.8766667+00:00
stephen nelson 0 Reputation points
2 answers

Exchange on Prem server Relay issue

Hi, we have just started having issue customer who is having hotmail.co.uk and outlook.com email address not able to recived emails from our relay servers which on prem ms exchange. We have office 365 exchange online if we send email from personal email…

Exchange | Other
Exchange | Other

A powerful email and collaboration platform developed by Microsoft, designed to support enterprise-level communication and productivity. Miscellaneous topics that do not fit into specific categories.

914 questions
asked 2026-04-15T09:25:45.3733333+00:00
Imran Khan 0 Reputation points
commented 2026-04-18T21:10:08.9133333+00:00
Vanessa Fraser 0 Reputation points
2 answers

Can't create a catchall rule for all domains in my MS 365 for business installation

Hi, I have a Microsoft 365 installation with one main domain (let's call it x1.com) and several additional domains (let's call them x2.com and x3.com). Currently, I have a catchall rule that works for the main domain x1.com. However, this rule does not…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-18T12:06:35.9666667+00:00
Isaac Moody 0 Reputation points
commented 2026-04-18T16:03:29.96+00:00
Isaac Moody 0 Reputation points
1 answer

Syncing Global Address List to Mobile Phones

Syncing Global Address List to Mobile Phones Specifically iPhones. Some users what to have access to the GAL while in the field

Exchange | Hybrid management
Exchange | Hybrid management

The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.

2,417 questions
asked 2024-02-29T13:30:04.8133333+00:00
DP 0 Reputation points
edited a comment 2026-04-18T13:54:25.9966667+00:00
Jo Ker 0 Reputation points
1 answer

Get-Recipient intermittently exhibit high latency, partial result sets, or timeout exceptions.

Our remote PowerShell sessions established via the Exchange Management Shell WinRM connect successfully, but core cmdlets such as Get-Mailbox, Get-Queue, and Get-Recipient intermittently exhibit high latency, partial result sets, or timeout…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,149 questions
asked 2026-04-18T04:00:29.16+00:00
Wortles Aslanbekov 0 Reputation points
answered 2026-04-18T08:28:14.45+00:00
Steven-N 24,365 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Session Duration

Hi All, I have been asked to implement the following changes and would appreciate guidance on the potential concerns and benefits of enabling these policies. For context, we are using Okta as our SSO and MFA provider, and we have an Exchange hybrid…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-04T08:57:54.4933333+00:00
Glenn Maxwell 13,656 Reputation points
accepted 2026-04-18T06:22:41.4333333+00:00
Glenn Maxwell 13,656 Reputation points
2 answers

Outlook support help. After reload of MS365 all my outlook email accounts are gone. Haven't received any emails since 2026.04.13 and Outlook continues to disconnect and reconnect itself. Was promised a call back. Never recieved

After reload of MS365 all my outlook email accounts are gone. Haven't received any emails since 2026.04.13 and Outlook continues to disconnect and reconnect itself. Was promised a call back. Never recieved

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-17T21:16:42.4366667+00:00
Claudia Russell 0 Reputation points
answered 2026-04-18T04:25:52.0266667+00:00
Vergil-V 11,650 Reputation points Microsoft External Staff Moderator
1 answer

I am freaking lost all of my emails

Its Saturday and I am freaking lost all of my emails, I still dont know what MS doing, I have raised ticket for 2 times, need them to review all the policies in our Exchange to see are there any affected policies, none of them have the respond Help…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-18T02:06:38.19+00:00
Ryszta Dikoko 0 Reputation points
edited an answer 2026-04-18T03:49:58.1666667+00:00
Vergil-V 11,650 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Attachment size

I am using exchange se edition hybrid env. we create users onprem and migrate to online.One of our users is unable to send an email with a 34 MB attachment (PowerPoint file). I have explained that Exchange uses Base64/MIME encoding, which increases the…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-15T07:04:59.6533333+00:00
Glenn Maxwell 13,656 Reputation points
accepted 2026-04-17T23:26:16.52+00:00
Glenn Maxwell 13,656 Reputation points
1 answer

Incompatible software in the "mydomain" domain when trying to associate my domain with purchasing acount account

Hello, I am getting this message when I try to associate my domain with a purchasing account Here is the error: "There are products and services in the"mydomain" that cannot be used with your purchasing account. Pick another domain from…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-16T14:48:58.6866667+00:00
Jason Adams 0 Reputation points
edited a comment 2026-04-17T21:04:27.5133333+00:00
Hin-V 13,840 Reputation points Microsoft External Staff Moderator
2 answers

Who can delete a M365 group created in Outlook

Quick question I was hoping to get some help with. If a M365 group is created via Outlook, who can delete that group and where can it be deleted from? My organization is currently in the process of evaluating increased restrictions on group creation, and…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-17T19:48:32.79+00:00
Chris LeMay 190 Reputation points
commented 2026-04-17T20:17:23.44+00:00
Vasil Michev 126K Reputation points MVP Volunteer Moderator
1 answer

How to protect from email spoofing?

It appears my emails are being spoofed. When I sent an email to a vendor it showed coming from a different organization. I have attempted to enable DKIM and DMARC but have been unable to enable this feature in Office Admin. Please suggest a solution. …

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-17T13:25:06.2466667+00:00
Roger Samples 0 Reputation points
edited an answer 2026-04-17T14:07:02.59+00:00
Jayden-P 19,370 Reputation points Microsoft External Staff Moderator
1 answer

How to create an alias on our restaurant work email

Hello everyone, we have a company email address that is the main point of contact for communications with our restaurant. As there are two of us handling different aspects of the day-to-day management, I would like to create 2 aliases using the same…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-15T23:30:20.81+00:00
Marco 20 Reputation points
commented 2026-04-17T12:45:14.88+00:00
Vergil-V 11,650 Reputation points Microsoft External Staff Moderator
2 answers

Conference room bookings are being accepted even when the rooms are already busy, leading to overlap issues.

Conference room bookings are being accepted even when the rooms are already busy, leading to overlap issues. Conference room hosted on M365 and all the settings are intact. Please check if there is any on going Microsoft issue which may affect the…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-17T07:42:11.86+00:00
Priya Jayaraman 346 Reputation points
recommended 2026-04-17T08:02:39.6666667+00:00
Jack-Bu 6,765 Reputation points Microsoft External Staff Moderator
2 answers

4.3.1 Insufficient system resources

All our emails just stopped! No one can send or receive anything. People trying to email us are getting a bounce-back message that says '4.3.1 Insufficient system resources.' I checked the server and it’s still running, but the C: drive is almost out of…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,149 questions
asked 2026-04-16T04:09:25.1133333+00:00
Yamanaka N 0 Reputation points
commented 2026-04-17T04:44:49.75+00:00
Hani-Ng 10,070 Reputation points Microsoft External Staff Moderator
2 answers

Room declined meeting

I'm getting tickets from users saying they can't book our main conference room. When they check the calendar in Outlook, the room looks completely free, but as soon as they send the invite, they get an automatic 'Decline' email saying the room is busy. …

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-17T01:00:39.5966667+00:00
Montez Martha 60 Reputation points
answered 2026-04-17T02:34:38.4266667+00:00
Hani-Ng 10,070 Reputation points Microsoft External Staff Moderator
1 answer

How is this possible? A SCAM email have a link to https://login.microsoftonline.com/common/oauth2/v2.0/authorize... but redirects to noutreashou.ru

How does this SCAM email have a link to: https://login.microsoftonline.com/common/oauth2/v2.0/authorize... (plus a very long string) but it redirects to <URL removed> This goes against everything I have been teaching our staff... (Hover over…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-15T16:41:47.48+00:00
IngallsPW1 41 Reputation points
edited a comment 2026-04-17T00:13:00.4333333+00:00
Steven-N 24,365 Reputation points Microsoft External Staff Moderator
1 answer

how to fix not receiving emails on my apple phone that appear on my computer

how to fix not receiving emails on my apple phone that appear on my computerow to fix not receiving emails on my apple phone that appear on my computer

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,120 questions
asked 2026-04-16T19:59:18.8833333+00:00
Eddie Heinemeier 0 Reputation points
edited an answer 2026-04-16T22:23:53.4566667+00:00
Hin-V 13,840 Reputation points Microsoft External Staff Moderator