troubleshooting Question

On-Prem and Office 365 GALs are different

Avatar of Joergen Lind
Joergen LindFlag for Denmark asked on
ExchangeMicrosoft 365* global address list
8 Comments1 Solution63 ViewsLast Modified:
Hi everyone.

We're in a hybrid setup with Exchange 2013 and Ofice 365.

Our issue is that some users with a mailbox in Office 365 cannot send to some users with mailbox on the on-prem Exchange 2013.
I've narrowed it down to the GALs, where the primarysmtp fields are different for the same user.

On-prem GAL entry:
smtp:user.name@company.com
smtp:user.name@company.dk
SMTP:user.name@dept-company.com
smtp:initials@company.dk
smtp:initals@dept-company.com
x500:/0=ExchangeLabns/.... etc

Office 365 GAL entry:
SIP:intials@company.com
SMTP.initials@company.com
SPO:SPO_436334 etc
x500:/o=COMPANY/ou=Exchange Administrative Group [FYDI.... etc
smtp:user.name@company.copm
smtp:initials@company.onmicrosoft.com

The MAIN culprit here is of course that the user's Primary SMTP address, listed in the Office 365 GAL, does not exist on the user's mail account at all.

But why are those two GAL's different? Is that by design? Links and/or helpful answers are much appreciated.

Thanks,

Bjorn Dirchsen
ASKER CERTIFIED SOLUTION
Shreedhar Ette
Technical Manager
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