Bug filed for this issue. For those who wish to dupe it, it is bug ID 21420857.
Bug details:
Title: Mac OS X 10.11.0 (15A178w): Restart required before first logging in with AD mobile user account
Summary:
When logging into an AD-bound Mac, where the Apple AD plug-in is active and set to create mobile users, a restart is required as part of a AD mobile account's first login
Steps to Reproduce:
1. Bind Mac running OS X 10.11.0 (15A178w) to Active Directory using Apple's AD plug-in
2. Enable the Apple AD plug-in's "Create mobile account at login" option
3. Disable the Apple AD plug-in's "Require confirmation before creating a mobile account" option
4. Log in at the OS X login window with an AD account which had not previously logged into this Mac
Expected Results:
Login process would appear pause briefly while the AD mobile account's account credentials were cached and home folder was created.
Once AD mobile account's credentials were cached and the home folder was created:
1. The loginwindow would disappear
2. The AD account would be passed into the account's Desktop.
Actual Results:
1. Login process would appear pause briefly while the AD mobile account's account credentials were cached and home folder was created.
2. A message dialog appears which states:
A restart is required before continuing.
You must restart and log back in to continue.
There's a Restart button on the window.
When the Restart button is clicked, the Mac restarts
3. Following restart, the Mac returns to the OS X login window
4. Log in at the OS X login window with the AD account which had not previously logged into this Mac
5. The login window disappears
6. The AD account would be passed into the account's Desktop.
Regression:
Notes:
All testing has been done in VMware Fusion.