we are doing sysvol shared folder migration across 300dc.

but we are getting through report that following servers (kcc cannot compute replication path)

is it because of that , if not then how should we correct it
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From a server that exhibits the problem, do this in an elevated command prompt :

dcdiag /test:connectivity

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Correct any problem that this command finds. Check the Event Log (System Log) on the affected server to see if there are network connectivity problems.

There might be metadata remains from removed DCs, that could cause the problem also (you try to replacate to non existant servers). Follow this procedure to clean up AD :

Also check in AD Sites and Services to see if all sites have sufficient link bridges, create link bridges as needed.

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