Enhancement Request: Support for Configuring an Alternate OS User for the File System Adapter

Hi,
In our environment, we have many transfers configured with the File System Adapter (FSA) to send files to remote NAS locations using the SMB protocol.
In our Active Directory environment, the technical user used by IBM B2Bi is granted access to the required remote folders by adding the user to the appropriate AD groups.
However, Active Directory has a limitation on the number of group memberships that can be assigned to a user, due to Kerberos token size constraints (approximately 1,015 groups / 1,024 SIDs).
We are approaching this limit, which means that we can no longer grant additional folder permissions to the existing technical user by adding it to new groups.
For this reason, we would like to request an enhancement to the File System Adapter: the ability to configure a specific OS user account for file system operations, independently of the user running the B2Bi process.

This would allow us to configure different technical users for different sets of transfers. For example, when the primary technical user reaches the AD group membership limit, a new technical user could be assigned to subsequent transfers, allowing us to continue granting the required permissions without being constrained by the group membership limit of a single account.
Currently, this does not appear to be possible. This was also confirmed in response to one of our support cases:
"The File System Adapter does not provide a configuration option to specify an alternate OS user account for file operations; it always operates with the permissions of the B2Bi process owner."

We believe that providing a configurable OS user for the File System Adapter would be a valuable enhancement for environments with a large number of transfers and granular access requirements.
Thank you for considering this enhancement.

Best regards,