I have found that depending on where your Windows AD Domain groups are located in the Windows Domain tree will impact how quickly your Windows AD Authentication is updated in CE 10.0 SP4. I believe it works same way in BOXI R1 and R2 as well. We have a group of over 10,000 users in a particular Windows AD group and it was taking hours for the AD accounts to be pulled into CE. The Windows Admin moved our AD group to the first level of the Domain tree and now the users are updated in less than one minute.
Example:
Windows AD Domain Tree:
AD--|
|----- Group 1 (1st level in tree)
|----- ----- Group 2 (2nd level in tree)
We found if you try to pull in Group 2, it will take several hours. However, if you try to pull in Group 1, it will take only a minute or two. In the olders version of CE like 8.5 and 9.0, it did not matter how far down the domain tree the AD group was, it would always pull in users within a minute or two. Starting with CE 10.0, they changed how WinAD plugin works and it is designed to work better if you have your Windows AD groups setting at level 1 in the Windows AD group tree. Putting groups at lower levels can dramatically impact performance of the update in the Windows AD authentication tab of the CMC...