Error message:
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Solutions2Share.Solutions.CollaborationManager.Services.Components.Security.Authenticate(SPWebApplication application, String username, String password, String& resultingSharePointLogin)
at Solutions2Share.Solutions.CollaborationManager.Services.ServiceApplicationProxy.CollaborationManagerServiceApplicationProxy.GetChannel(Uri address)
Cause:
The SecureStore contains a user who does not have sufficient permissions.
Solution:
Store the farm account in the SecureStore under the application ID "Collaboration Manager".