Exchange 2019 set-AvailabilityConfig PerUserAccount and OrgWideAccount at the same time

Hello,

My company has two different forest, with an Exchange organization in each forest.

An AD trust is configured between the 2 forests.

For the free/busy, we have configured the set-AvailabilityConfig with PerUserAccount.

We plan to configure the free/busy with another company.
There will be no trust with this company.

Can I configure the set-AvailabilityConfig with OrgWideAccount for the new company, while maintaining the PerUser configuration with the other trusted forest?

Thanks

Arnaud