PeopleHR won't be out of use during the integration process and it won't affect the functionality.
We have answers to the most asked questions about the integration:
What does the PeopleHR integration with Access Evo (previously Access Workspace) do?
Is there a new login for PeopleHR?
Do our users need to update their login details?
Can I specify access to be updated by default for other applications?
Am I being charged for this integration?
Who are my Access Evo Administrators?