Exchange Online

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…

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…

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 …

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…

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 !!!

Block IP v4

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

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…

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

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.

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

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…

How to retrieve my emails.

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

How to Recover a non-permanently deleted email from M365 Quarantine

I have a user who had an incoming email that ended up in the Quarantine. I regularly clean the Quarantine, using a non-permanent deletion. From what I understand, I should be able to retrieve the email, but I can find the appropriate instructions on how…

Body of Email is showing as Hyperlinks

Good morning, I am having a curious issue with a user. Sometimes, when she composes an email, the body of the email will be converted to Hyperlinks. If I pull the data, put it into a text file, then put it back into the body of an email, it shows as…

Outbound external email is rejected with 550 5.7.708 ‘Service unavailable.

Outbound external email is rejected with 550 5.7.708 ‘Service unavailable. Access denied, traffic not accepted from this IP.’ Internal mail works. SPF, DKIM, and DMARC are configured. Account is not in Restricted entities. Please remove the new-tenant…

No Emails Going Out - 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold

Someone found a backdoor and ended up abusing our app by sending spam emails to 10000 users. We have since remediated this. My email domain can no longer send outgoing emails. I get the error below. I bought the domain email/office account through…

cannot receive emails

cannot receive emails with Outlook having rejected email message

Cant log in to my email

this is the message I receive;

How to fix microsoft.exchange.clients.owa2.server.core.owaauthconcurrencyleaseacquiretimeoutexception.An error occurs when logging into Outlook email.

Request for Updated DNS Records for Microsoft 365 Email Setup

I migrated my email from GoDaddy but I can't receive/send emails. I was informed by an email from GoDaddy that they have confirmed that there is no longer any tenancy at GoDaddy, but the current domain DNS TXT records and SPF records are still pointing…