Notes addresses with spaces and some special characters are replaced with underscore (4321062)

During migration of mail-in databases, the empty space in proxy addresses gets replaced with an underscore by Migrator Notes to Exchange (MNE).

The MNE migration engine has a setting to change invalid characters to another character.

• There is no option to replace a blank space with a dot and there is no option to skip addresses with spaces.
• MNE uses a parameter called FilterAddressReplacementChar to replace invalid chars when it builds O365 addresses.

NOTE: SPACE is always replaced by UNDERSCORE, it is not controlled by FilterAddressReplacementChar.