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Cannot Raise Domain Functional Level Found on Spiceworks: https://community.spiceworks.com/topic/2001689-cannot-raise-domain-functional-level?utm_source=copy_paste&utm_campaign=growth

Hi there,

Trying promoting 2016 server from 2008r2 server after moving FSMO roles and verified the roles are in the new DC. but when I try to raise domain functional level, i get this error "The functional level could not be raised. The error is: The server is unwilling to process the request." I had to do dcpromo /force on the old dc as the dcpromo would not ran. Any thoughts would be greatly appreciated..

Thanks,
TW
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J0rtIT
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I already demoted the 2008r2 dc. I ran dcpromo /force since it would not just demote with the dcpromo command. There is also an exchange server 2008 which stopped functioning. I have not touched it anything. I still show the old dc in dc our in the new dc but when I try to delete it manually it is promoting that I need to run the adds removal roles wizard first so it deletes it properly. Please advise...
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Mahesh
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Thanks, but when I try to delete old dc in DC OU in active directory it gives an error "Windows cannot delete object LDAP://DC2.DCNAME.COM/CN=DC1,CD-Computers,DC=DCNAME,DC=com" because access denied.
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Fixed it. Thanks Mahesh and Jose. I went to ADDS and deleted old DC then it would let me delete the DC on DC OU. It was very helpful.