If you currently are using a Custom Access Level within BambooHR, please check out this article on how to enable sufficient access for Basic User Provisioning!
Add in your subdomain for your BambooHR Account to Merge Link.
You will be redirected to BambooHR to log in to your account. Enter your BambooHR account credentials.
Once entered, your Authentication is complete!
Note on non-Full Admin Access Levels and Merge Impact:
If you have Employee Access Level:
After linking, you will only be able to view details specific to your profile
There will be a null Employee record around your manager
If you have Manager Access Level:
After linking, you will only be able to view details specific to your profile and only your indirect + direct reports.
If you have Custom Access Level:
You should set your Access Level to view "All Employees", otherwise the data synced will be altered and result in null employee records.
You should allow View Access to information you would want to be synced
You should allow Access to view your section as well to ensure your record is also synced to Merge.