Difference between 32bit and 64 bit using Outlook within cobolprogram

I using Outlook to send pdf's to customers and it is working fine with Windows7 and 32 bit.

On Windows10 and 64bit i got error's starting: Modify NAMESPACE-HANDLE LOGON().

The handle has a value.

Are there changes to make?

An AxdefGen64 has created a new def.