Exchange Integration fails after upgrade to 2019 R1 / Exchange Integration does not work with Password Encryption
This is a known issue and is already being addressed. We are in process of providing patch for this soon.
In mean time until we release patch there is a below workaround you can use.
Excahnge Integration connection fails at second step.
Remove the Encrypted password directly from the database by setting it to NULL or with Any password you want.
Run below queries.
UPDATE users SET User_Password = NULL WHERE user_userid = 1
UPDATE users SET User_Password = ' xxxxx ' WHERE user_userid = 1
After successful execution of above query Exchange integration will work as normally.