Are you sure it is 2008 R2 and NOT STD??? 2008 Std has been a non starter since day one. I had to delay install v2016 on my 2008 std server for five months until I could get it upgraded to 2012 R2. A royal PTA since my server support is 900 miles away. I had to back it up, box it up and ship it out. Went on a week long vacation. Three days after I returned, it was on my front door (yes, there is a long story behind this). I have several people on 2008 R2 running it without issue.