Symptoms
On attempt to access the tab CCP > Office 365 the following error is displayed:
Unknown error occurred
The following error can be fount in browser debug console:
[HttpCompileException]: c:\inetpub\wwwroot\O365App\App_Code\ServiceProvider\PC\PcCustomerManager.cs(22): error CS0101: The namespace 'Parallels.Office365.Ga
teway.ServiceProvider.PC' already contains a definition for 'PcCustomerManager'
at System.Web.Compilation.AssemblyBuilder.Compile()
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()
...
Note: the file name can differ from PcCustomerManager.cs
.
Cause
There is a duplicate or backup of the file PcCustomerManager.cs
in the App_Code
directory of the endpoint. IIS loads and process all available *.cs files in the application code directory and encounters the error ...already contains a definition for...
in case some namespace is defined twice.
Resolution
Check the App_Code
directory for a duplicate of the reported file and move it to a different location. It is also recommended to recycle IIS application pool after this.