On our TFS build server, we're getting the following error most builds (so not ALL builds, sometimes the build runs perfectly!)
"The identity of application pool application_pool_name is invalid. The user name or password that is specified for the identity may be incorrect, or the user may not have batch logon rights. If the identity is not corrected, the application pool will be disabled when the application pool receives its first request. If batch logon rights are causing the problem, the identity in the IIS configuration store must be changed after rights have been granted before Windows Process Activation Service (WAS) can retry the logon. If the identity remains invalid after the first request for the application pool is processed, the application pool will be disabled. The data field contains the error number."
Since it runs some builds, we know the identity is in fact not invalid and that it's not a code problem. Does anybody know if there are any other cases where you can get this specific error? We've had this problem for several months now...
EDIT: We've also found out it started after MS updates KB4015547 and KB4015550, but uninstalling them didn't help. Re-entering the user or using another user didn't work either.