Today I finished an in place upgrade of CRM 2011 to CRM 2013 with a SQL server 2014 database. As far as I know not yet officially supported by Microsoft but…, it works! The database was already upgraded on the CRM 2011 installation. An in place upgrade to CRM 2013 worked without error.
Installing UR2 however produced an error “Action Microsoft.Crm.Setup.Common.Update.DBUpdateAction failed”. Luckily I wasn’t the first to run into this one so I have solved it using this thread: Error when installing RU1 for CRM 2013. The suggestion in the article is to rename these two tables in MSCRM_Config:
and install the rollup. This will recreate the table dbo.dbupdateinstallinfo and the update finishes without error. Afterwards I deleted the renamed tables. Probably could have done this right away but who cares, it works!
WARNING: The action described here is probably unsupported by Microsoft. Make a backup of your MSCRM_Config before you start and only try this if you feel confident about your capabilities to do a rollback or complete reinstall in case of failure.