over the weekend  I attempted an install of the windows exchange server 2013 sp1 on a server running windows server 08 R2, the installation was halted due to having installed split permissions. I need to revert back to the standard active directory mode but when I attempt using cmdlets I get a message that setup is not allowed in the cmdlet. where did I go w

Follow the removal of split permissions in this article:

https://technet.microsoft.com/en-us/library/dd638155%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396

Basically you'll run the cmdlet "setup.exe /PrepareAD /ActiveDirectorySplitPermissions:false /IAcceptExchangeServerLicenseTerms", but there's a few steps after that.

thanks for your help but my problem is when I run cmd or powershell even In administrator mode, It wont accept the "setup.exe ............ cmdlet. I have checked the path and directories. no help

 You're using the same setup file or media as when originally installed?