Office 365 Dynamic distribution groups and on prem AD accounts

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Occasional Visitor

Hi,

 

I have created a dynamic dist grp in exchange online.

We also have a previous on prem AD with sync on.

Its a hybrid solution.

 

Apparently some users doesn't receive the mail i send to the DDG.

I can see the the users not receiving email was created in the on prem AD years ago.

 

what have i missed?

 

 

 

1 Reply
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Where are their mailboxes located? Have you confirmed they are returned as actual members of the DDG? Have you run a message trace and what does it show?