Hi Guys
After coming into work today to find that users are not able to send emails to distribution groups that previously worked before (for years), all emails are from internal users to internal groups. No bounce-back emails are being generated by exchange and no other errors are obvious as everything looks normal.
Nothing has/had been changed on the server. All individual/multi person emails are working as normal.
All I can find online is problems sending from external emails to internal group and authentication issues, nothing on internal-internal.
Has anyone seen this before or have any idea what is causing this?
Exchange 2013
Windows Server 2012 R2
After coming into work today to find that users are not able to send emails to distribution groups that previously worked before (for years), all emails are from internal users to internal groups. No bounce-back emails are being generated by exchange and no other errors are obvious as everything looks normal.
Nothing has/had been changed on the server. All individual/multi person emails are working as normal.
All I can find online is problems sending from external emails to internal group and authentication issues, nothing on internal-internal.
Has anyone seen this before or have any idea what is causing this?
Exchange 2013
Windows Server 2012 R2