I recently completed a migration from Exchange 2013 to Exchange 2016 and after the Exchange 2013 server was uninstalled that’s when the issues with OAB started. I confirmed that all the mailbox databases were set with the Offline Address Book.
I confirmed that the OAB Virtual Directory was set with the correct URL.
I ran the Outlook Test Email AutoConfiguration and noticed that in the output it didn’t have a line for OAB.
It turns out that the Offline Address Book needed to be set for Global Web Distribution.
The following event log on the ADFS server indicates the SSL certificate has expired:
Log Name:AD FS/Admin
An error occurred during an attempt tobuild the certificate chain forconfiguration certificate identified by thumbprint'365CB832EA38FB61E74C57AF6E875233507DD25E'.Possible causes are that the certificate has been revoked orcertificate isnotwithin its validity period.
The following errors occurred whilebuilding the certificate chain:
MSIS2013:Arequired certificate isnotwithin its validity period when verifying against the current system clock.
Ensure that the certificate isvalid andhas notbeen revoked orexpired
ADFS Management Console shows the certificates:
Running the following command we can see the certificate settings for ADFS:
I changed the settings to Auto Rollover and have a certificate duration for 3 years.