In some environments, simply indicating the UNC in the console for the software library will not work. Another scenario is when the Application Identity (App ID) credential is changed, access denied messages are generated.
An error of "the specified UNC does not allow read/write access" is displayed after clicking the "Validate" button.
In addition, a similar error like the following may appear:
WebApi Controller failure.
Access to the path '\\SMP Name\softwarelibrary\GUID' is denied.
ITMS Software Management Solution