Cant send external email to shared mailbox -O365

[newpersn]

Hello.

 

Long story short.

 

Person left and I have converted the mailbox to a shared mailbox. Deleted on-perm account and had to restore the mailbox in O365. -

 

I can send emails from the same domain. But when i send external email it bunces back with a

Remote Server returned '554 5.4.1 '

 

I can send externally from the account by not receive email.

 

The account was all working before i deleted the on-prem account.

Hybrid setup with Exchange 2010

 

Any ideas?

[newpersn]

Fixed this. Problems with address still attached the user on the onsite exchange server. (removed user from Contract and it working)

[newpersn]

Grr. This has come back again.

 

Can't find anything using the address in the onsite exchange.

 

Any ideas? Getting this error.

 

Undeliverable: test

 

 

 

Tue 14/07/2020 16:44

 

Inbox

 

To:

 

Finance@email address

 

To send this message again,click here.

 

Delivery has failed to these recipients or groups:

finance@email address.

A communication failure occurred during the delivery of this message. Please try resending the message later. If the problem continues, contact your email admin.

 

The following organization rejected your message: LO2GBR01FT017.mail.protection.outlook.com.

 

 

 

 

 

 

Diagnostic information for administrators:

Generating server: AM6PR06MB5510.eurprd06.prod.outlook.com

finance@email address

LO2GBR01FT017.mail.protection.outlook.com

Remote Server returned '554 5.4.1 '

[Steve21]

When you made it a shared mailbox, I assume you do mean shared mailbox rather than mail enabled public? Just often that's where a 5.4.1 is from as it's rejecting it to publics (DBEB will block that by default nowadays)

 

Also DBEB wise, I assume you've checked that the new shared mailbox has the right SMTP etc (as in your real domain, rather than onmicrosoft etc)

 

Steve

[newpersn]

Hi.

 

It was a users mailbox who left. Converted in to a shared mailbox as it was finance.

 

SMTP settings look fine.

Edited July 14, 2020 by newpersn

[Roberto]

Test sending to the onmicrosoft address.

I’d that works, change the primary smtp address to something else. If that now works, change it back to what it was.

[Steve21]

Well I mean 5.4.1 is still normally one of a few things,

 

Either it's broken MX which should affect everything/mail wise

It's DBEB blocking it, which means it's not happy with the address or type (e.g. public folder)

Your connector is unhappy if you're using hybrid

 

I'll ask again just because You are sure it's a shared mailbox? (Not public mailboxed enabled folder, or O365 group etc?) and it has finance@ as the primary SMTP (not secondary smtp etc?)

 

If you know you're not going to have some downtime, you could test DBEB by doing Mail flow > Accepted domains -> Edit -> (Change to Internal Relay assuming it's Auth), re-sync AADC and re-try and see if it sends ok. Shouldn't leave it that way long term, but if it's DBEB should remove the block for that test mail

 

Steve

[newpersn]

I can send emails out from this address.

 

But can't send emails to this address from another email account.

[Roberto]

I can send emails out from this address.

 

But can't send emails to this address from another email account.

 

Did you try what I suggested? What happened? If it doesn’t have an onmicrosoft email address, can you add a secondary email and send to that?

[newpersn]

Did you try what I suggested? What happened? If it doesn’t have an onmicrosoft email address, can you add a secondary email and send to that?

 

Didnt work sending to the ONMS email address.

 

I've noticed the sync client hasn't sync since 1pm yesterday. - Trying to fix this now

[newpersn]

Didnt work sending to the ONMS email address.

 

I've noticed the sync client hasn't sync since 1pm yesterday. - Trying to fix this now

 

Azure Sync client now working.

[newpersn]

Azure Sync client now working.

 

Not fixed the issue i might add.