7,292 questions with Exchange Online tags

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2 answers

How allow access to shared mailbox for external users (users are external members via cross tenant trust)

Hello, I have created a trust between 2 tenants A and B. Cross-sync is established from tenant A to tenant B. Users of tenant A are available as external members in tenant B. Next, I added these external users to shared mail for delegated access for both…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-07-02T11:07:11.3633333+00:00
Anish Kumar 0 Reputation points
answered 2026-07-02T11:58:49.42+00:00
Vasil Michev 127.2K Reputation points MVP Volunteer Moderator
1 answer

Unable to remove 0365 alias

I am unable to remove alias email address for active users. There is no "Manage email aliases" or trash can in "Manage username and email".

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-07-01T13:25:34.7033333+00:00
Dave Nelson 15 Reputation points
edited an answer 2026-07-02T08:34:47.2966667+00:00
Rin-L 22,265 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Need to reject emails sent with any attachments to a distribution group in M365

Need to reject emails sent with any attachments to a distribution group in M365 Cheers Priya

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-07-01T12:42:51.0333333+00:00
Priya Jayaraman 446 Reputation points
commented 2026-07-02T07:19:31.5866667+00:00
Jayden-P 24,710 Reputation points Microsoft External Staff Moderator
2 answers

Automatic replies only to emails outside the organization?

Hello, I need to set up automatic replies for a shared mailbox. However, only for external emails, it doesn't matter for emails within the organization. There is an option for automatic forwarding in the Admin Center. I can even set it to send a…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-26T11:38:14.2066667+00:00
Michal Rama 40 Reputation points
commented 2026-07-01T13:17:18.1166667+00:00
Jack-Bu 6,775 Reputation points Microsoft External Staff Moderator
1 answer

AutoForwardingMode locked as "Automatic" on CSP-managed tenant – Set-HostedOutboundSpamFilterPolicy blocked despite Enable-OrganizationCustomization

I manage a Microsoft 365 tenant licensed through a CSP reseller (IONOS). I need to enable external email forwarding via a transport rule, but external recipients are receiving NDR 550 5.7.520 ("Your organization does not allow external…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-30T11:17:49.5633333+00:00
Rohit Gorasia 0 Reputation points
edited a comment 2026-07-01T06:49:39.1566667+00:00
Jayden-P 24,710 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

How to backup to PST Exchange Online Archive Mailbox for separated employees

Dear Experts, I would like to request for your inputs on how I can backup to PST Online Archive of separated employee's mailbox, the easier way. I was checking on Purview however I could not see the option for Online Archive Mailbox as a…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-07-01T02:09:38.7033333+00:00
John Rey Toston 20 Reputation points
commented 2026-07-01T05:27:22.28+00:00
Darren-Ng 11,775 Reputation points Microsoft External Staff Moderator
1 answer

Release my live.com email

My Microsoft business account has been closed. I was not able to transfer email settings back to the original source. Please return my email MX settings to my website [Moderator note: personal info removed] at [Moderator note: personal info removed] . …

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-29T15:25:42.9166667+00:00
Dr M Ryan 0 Reputation points
edited the question 2026-06-30T00:36:18.7366667+00:00
Hani-Ng 12,585 Reputation points Microsoft External Staff Moderator
1 answer

Tenant RMS service not bootstrapped for domain

Title: Tenant RMS service not bootstrapped for legit.help — Import-RMSTrustedPublishingDomain cannot complete via EXO PowerShell, /informationProtection/rms returns 404 Tenant ID: [Moderator note: Personally Identifiable Information removed] Admin UPN:…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-29T21:34:46.24+00:00
Greg Clark 0 Reputation points
edited the question 2026-06-29T22:21:14.8166667+00:00
Hendrix-C 18,250 Reputation points Microsoft External Staff Moderator
1 answer

Can we find who sent an email (send-as or send-behalf rights) for a shared mailbox?

Can we find who sent an email (send-as or send-behalf rights) for a shared mailbox? Cheers Priya

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-26T11:13:01.22+00:00
Priya Jayaraman 446 Reputation points
commented 2026-06-29T12:43:55.34+00:00
Vergil-V 15,775 Reputation points Microsoft External Staff Moderator
2 answers

Can not send or receive emails

Trying to download the new Microsoft email and only shows me mail that's in the trash and not downloading new emails Moved from: Microsoft 365 and Office | Other

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-26T02:58:33.9566667+00:00
Wendy Caron 0 Reputation points
commented 2026-06-29T03:08:05.29+00:00
Hani-Ng 12,585 Reputation points Microsoft External Staff Moderator
2 answers

Block IP v4

How can I block IPv4 and also check the list of the blocked IPs in Microsoft Defender

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-25T18:34:49.1733333+00:00
Marcel Ghioca TANAGER 0 Reputation points
edited a comment 2026-06-29T02:50:20.6266667+00:00
Hani-Ng 12,585 Reputation points Microsoft External Staff Moderator
1 answer

I have had no access to my Exchange email on my iPhone for 2 days. I have received an ID for this incident: ID [Moderator note: personal info removed] .

I have had no access to my Exchange email on my iPhone for 2 days. I have received an ID for this incident: ID [Moderator note: personal info removed] When I attempt to reset my password, I get a 2-digit code which I then type into Microsoft…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-28T12:11:29.04+00:00
Michel Gevers 0 Reputation points
edited the question 2026-06-29T00:18:28.6333333+00:00
Hani-Ng 12,585 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Email Migration

Hi All, Our company acquired another organization of approximately 500 users about four months ago. The acquired company currently uses Google Workspace, while our organization uses Microsoft 365 E5. Users currently use both Google Workspace 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.

7,292 questions
asked 2026-06-10T04:28:04.6433333+00:00
Glenn Maxwell 13,981 Reputation points
accepted 2026-06-26T20:01:48.3466667+00:00
Glenn Maxwell 13,981 Reputation points
3 answers One of the answers was accepted by the question author.

External Sender

Hi Team, I am having an issue where emails from a legitimate external sender are being flagged in Outlook as "Unverified". An external user (extuser(at)somedomain.com) sends email to an internal user. The email is delivered successfully to 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.

7,292 questions
asked 2026-06-18T00:38:13.0766667+00:00
Glenn Maxwell 13,981 Reputation points
accepted 2026-06-26T20:01:27.56+00:00
Glenn Maxwell 13,981 Reputation points
2 answers One of the answers was accepted by the question author.

Query on Migration

Hi All, I’m not sure if this is the right forum for this question, but I am planning to migrate mailboxes from Google Workspace (Gmail) to Microsoft 365 using the Microsoft FastTrack migration service. My project settings are: Exclude rules: No …

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-17T17:24:09.1633333+00:00
Glenn Maxwell 13,981 Reputation points
accepted 2026-06-26T20:01:15.72+00:00
Glenn Maxwell 13,981 Reputation points
1 answer One of the answers was accepted by the question author.

unable to send an email

Hi All, I am using Microsoft 365 E5 licenses. One of our users is attempting to send an email or calendar invitation to approximately 5,000 recipients, but the message is not being sent and appears to be hitting an Exchange Online recipient limit. My…

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-26T06:24:50.5566667+00:00
Glenn Maxwell 13,981 Reputation points
accepted 2026-06-26T19:59:43.92+00:00
Glenn Maxwell 13,981 Reputation points
4 answers

Evidently I've been hacked -- Remote server returned '550 5.7.233 error message

got this error message -- Remote server returned '550 5.7.233 -- ZERO idea how to fix. 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.

7,292 questions
asked 2026-06-25T16:13:41.74+00:00
Bill Palte 0 Reputation points
answered 2026-06-26T16:41:11.22+00:00
Sumit D - IA 171.8K Reputation points Independent Advisor
1 answer

Does Exchange Online support BIMI verification?

Just came from a provider who support's BIMI and it appears Microsoft just has support for their CRM. Is that true? Besides the verification, BIMI puts my company logo in the users inbox, instead of a generic symbol.

Exchange Online
Exchange Online

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

7,292 questions
asked 2025-09-29T01:01:08.0933333+00:00
Bruno Gabriel 5 Reputation points
commented 2026-06-26T06:56:05.44+00:00
Furter Dario 0 Reputation points
1 answer One of the answers was accepted by the question author.

How to fix Public Folder emails with MSGFLAG_UNSENT set to True

We were just trying to migrate away from public folders to M365 groups and it was a bit of a disaster. After rolling things back we are now seeing some but not all messages show up as drafts, they appear to be forwarding to our own email address 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.

7,292 questions
asked 2026-06-24T20:07:04.4766667+00:00
Mark MacLachlan 20 Reputation points
accepted 2026-06-25T22:46:57.8066667+00:00
Mark MacLachlan 20 Reputation points
1 answer

How to retrieve my emails.

I have not received my emails since Friday, June 19, 2026. How can I resolve this issue?

Exchange Online
Exchange Online

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

7,292 questions
asked 2026-06-24T16:06:08.02+00:00
Raymond Obiamalu 0 Reputation points
edited a comment 2026-06-25T22:13:14.96+00:00
Kristen-L 13,850 Reputation points Microsoft External Staff Moderator