You have multiple Windows 2012 Servers within the same subnet with Symantec Mail Security installed but when you try to change the assets from the SMSGUI to manage multiple servers you get a prompt to Authenticate and after you enter the credential successfully you get the error as below
Open the IIS Manager of each of the Server with SMSMSE and install the ASP.NET 4.5 as below
No restart of IIS , SMSMSE or Windows Server is required
Imported Document ID: TECH212050
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