Forum Discussion

audi911's avatar
audi911
Brass Contributor
Jan 21, 2023

Exchange 2019 error 2004 cannot log in to owa with any new user?

Hello, 

I am faced with a very bizarre situation which I have never encountered before perhaps someone has seen this. I have an on-prem exchange 2019 server. Everything works fine, all users can connect but I cannot create any new users. I explain, I create a user in AD, assign it a mailbox, everything performs correctly. But when I try to add the mailbox to outlook or try to log in via OWA I always get incorrect password. No matter what I do. 

 

One thing I noticed is that in my ECP, prior to making this new user I had 3 self signed certificates that were invalid. I simply clicked "renew" and they all became valid. However, now in my event viewer I keep getting the following warning

 

 

Unable to find the certificate with thumbprint in the current computer or the certificate is missing private key. The certificate is needed to sign the outgoing token.

 

 

A little googling and it seems this error is related to Microsoft Exchange Server Auth Certificate but mine is valid. However, I'm starting to think that I cannot connect any mailboxes because somewhere in IIS it is not finding the correct certificate, or maybe it is not bound properly?

 

I saw a similar post which says if we already have a valid certificate we can run the following command

 

Set-AuthConfig -NewCertificateThumbprint THISONEEXISTSINEXCHANGE -NewCertificateEffectiveDate (Get-Date)

 

but I'm unsure what this will do or if it will fix the issue. Before I do anything I'd like to get some expert opinions on this, have anyone ever come across this kind of issue?

 

Thanks

Resources