Machine keys corrupt on OS Family 5 deployments
Good bug details here, multiple repros:
In short: You cannot - programmatically or manually via RD - change the identity of an apppool - because machine keys are corrupt on the images used for family 5 os.
Baris Caglar commented
This is fixed for RS3 and we will try to backport it into Server 2016.
Yanbing Shi commented
Hi Marcus. Yes, IIS team has looked into the issue.
Marcus Wendt commented
Ping - I'm wondering if this got looked into and is confirmed? The repro is: set a specific user for an apppool on a Web Role (family 5), either via UI or programmatically).