When attempting to start or stop services hosted with the ArcGIS Server site, an error message similar to the following may be returned:
Error: ArcGIS Server site is currently being configured by another administrative operation. Please try again later.
The error can be returned if the Windows account running ArcGIS Server does not have sufficient permissions to the ArcGIS Server directories and configuration store.
Ensure the Windows account associated with the ArcGIS Server Windows service has adequate permissions to the ArcGIS Server folders.
On the machine hosting ArcGIS Server:
Note: Running the Configure ArcGIS Server Account utility requires the user name and password of the account that is used to run ArcGIS Server. The account can be either a domain account or a local account. If the account is not known, find the account by looking in the Windows Services console. For more information, refer to ArcGIS Enterprise: The ArcGIS Server account.