Hi there,
Please refer to the below docs for information on cookies and how they are set.
Cookies and the ID Service
How the ID Service requests and sets IDs
When it specifically comes to audience manager if we are deleting the cookie after logout ,the customer Id will be associated with a new cookie/device ID every time logs in.However,there are limits to the number of cross-device ID mappings associated to a device ID.
The new limits are:
• 100 device IDs per cross-device ID
• 10 cross-device IDs per device ID
For details on the new mapping limits visit the Usage Limits documentation
Regards,
Shweta