Active Directory replication

5 pts.
Tags:
Active Directory
Active Directory Administration
Hey guys, I've got a question that has stumped me at uni and I need some assistance if possible please! I've got responses for 1 and 3 but I'm not sure about 2. I'm also not sure of any other scenarios to check for? Thanks! You've inherited an environment which has been without a sys admin for a long time. An audit has revealed the following problem. How would you rectify the issue and what other scenarios would you check for.
  1. AD replication has failed between at least 2 sites
  2. OU users, roles and groups are out of date. Some users are active and shouldn't be other users are in the wrong groups.
  3. At least one DC has failed and is not recoverable


Software/Hardware used:
Windows server, active directory

Answer Wiki

Thanks. We'll let you know when a new response is added.
1 Check the site links are still viable. Check replication schedules. Check DC error logs. Check that network links exist between the sites. can you ping DCs across the network.  Does replication wok within the site. Was there a bridgehead server defined that has failed. Try a manual  replication. Repair as necessary.
2 Find and remove inactive users – anyone not logged in for 90(?) days. Discover who should be in which groups and modify group by group (Long process)
3 If the failed DC is a FSMO role holder seize those roles onto another machine. Delete the failed DC using AD Users and Computers. Build a new DC – with a NEW name – and allow replication to bring it up to date.

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