upgrading from exchange 2013 to 2019, new install of 2019..cannot login to ecp or owa

hi, thanks in advance for your help. i have an existing small environment. it consists of a pair of 2022 domain controllers, the domain/forest level is set to 2016. I have an existing 2012 (not r2) ...

2013

2019

ECP

Exchange Server

OWA

tonyguadagno
Sep 01, 2023
ok, after spending $500, 3 weeks and 4 engineers, I finally have this fixed...i hope this will help you.

the moral of the story is pay attention to the warning messages. In mine, you will see it referencing a cert thumbprint. this thumbprint is the Microsoft Auth Certificate on my Exchange 2019 server. I had found this article but it talks about your auth cert being expired...my auth cert was not expired so I dismissed it...and so did the Microsoft tech until they could not think of anything else to do....so they recommended we recreate the auth cert any...and this fixed my issue.

if you have this warning message, the issue is almost certainly the cert it references!

good luck

tonyguadagno

Copper Contributor

Aug 09, 2023

ok, for anyone out there struggling with this , i have a small amount of help. The reason you cannot find any info on how to move the "system mailbox" is because Microsoft does not use that term...they use the term "arbitration mailboxes"....when you search on that, you get a lot of hits like this one: https://www.alitajran.com/move-arbitration-mailboxes-in-exchange-server/

TaeYounAnn

so, now that i understand how to move the arbitration mailboxes, i have done so and can confirm they are moved to my new 2019 exchange server

.....however...

this has not fixed my issue...ug

i get the exact same behavior and warning in the event viewer as before......

any other suggestions would be appreciated.

thanks