Token Authentication (Effective Tokens Support)
BI Office includes an option for Effective Tokens support which will allow the application to operate in environments where Kerberos tokens fail; are intermittently available and in complex domain models where Kerberos is not possible.
Effective tokens uses the EffectiveUserName flag built into the SSAS. This flag is internal to SSAS and requires administrative privileges.
Please note: This does not imply that the application is running in a less secure mode.
For this feature to operate, the following prerequisites are required:
1. The installation must use an Active Directory
2. The user account set in the “data source user” setting, must have administrative rights on the all data source servers
3. SSAS services must be running under a network user or domain user (Local services/users will not work)
If your implementation does not meet either of these standards, do not enable this new feature or your installation may not connect to Analysis Services successfully.
Effective Tokens support can be enabled in the Administrative Console under Settings > Networking
External reference: https://msdn.microsoft.com/en-us/library/dn140245.aspx