Update EnableMailboxAuditing.ps1

[itpro-tips]

• Foreach all mailboxes instead of pipeline to prevent error in case of duplicated mailbox name
• Add UpdateInboxRules, UpdateCalendarDelegation to AuditAdmin and AuditOwner (MC142244)

[PsychoData]

@itpro-tips How.... do you have a duplicated mailbox when they're all coming from the same Get-Mailbox command?

[itpro-tips]

Hello,
For example I have a user mailbox and sharemailbox with the same name 'support'. So when I pipe Get-Mailbox directly to Set-Mailbox, EXO PowerShell doesn't know what to do as it finds two mailboxes

[msftclas]

All CLA requirements met.

[007]

@itpro-tips need to resolve conflicts. Does #57 resolve this PR or is anything still missing?