Having issue Azure AD joining a Windows 10 or 11 computer and getting error 8018000a? This script might help you. It deletes all keys except Context under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Enrollments

$EnrollmentsPath = “HKLM:\SOFTWARE\Microsoft\Enrollments\”
$Enrollments = Get-ChildItem -Path $EnrollmentsPath
$DiscoveryServerFullUrls = @(“https://wip.mam.manage.microsoft.com/Enroll”)
Foreach ($Enrollment in $Enrollments) {
$EnrollmentObject = Get-ItemProperty Registry::$Enrollment
if ($EnrollmentObject.”DiscoveryServiceFullURL” -in $DiscoveryServerFullUrls ) {
$EnrollmentPath = $EnrollmentsPath + $EnrollmentObject.”PSChildName”
Remove-Item -Path $EnrollmentPath -Recurse
& “C:\Windows\System32\deviceenroller.exe /c /AutoEnrollMDM”
}
}

References:

https://jocha.se/blog/tech/azure-ad-mdm-intune-error-8018000a

If you have deleted a user in Exchange Online that is synced from onprem and you need to restore it, you might not want to re-sync the local user. In that case you can restore the deleted user directly in Exchange Online and make a cloud only user.

Get the deleted mailbox by name and Exchange GUI:

Get-Mailbox -SoftDeletedMailbox | Select-Object Name,ExchangeGuid

Create a new cloud only user or shared mailbox and run this command:

Get-Mailbox -Identity <NameOrAliasOfNewTargetMailbox> | Format-List ExchangeGuid

Restore the deleted mailbox/user into the newly created cloud user:

New-MailboxRestoreRequest -SourceMailbox <SoftDeletedMailboxGUID> -TargetMailbox <NewTargetMailboxGUID> –AllowLegacyDNMismatch

References:

https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/delete-or-restore-mailboxes

With the newer versions of Outlook 365, when creating a new invitation, a Teams Call link is automatically added to every meeting, which might not be wanted by some customers. Here is a quick way to disable it for the whole tenant:

Connect-ExchangeOnline

Set-OrganizationConfig -OnlineMeetingsByDefaultEnabled $false

To check out if the settings has changed:

Get-OrganizationConfig | select OnlineMeetingsByDefaultEnabled

Microsoft Intune or Endpoint Manager is awesome but also a pain if something does not work as expected. For example, if you create a package that simply imports a reg file, it will import the keys under SOFTWARE\WOW6432Node (WOW or SysWoW means Windows32OnWindows64). This is normal behaviour because Microsoft Intune Extension runs as a 32 Bit process on Windows. Therefore it does not know about the 64 Bit architecture.

So the solution is to run the reg command with this option. This will import the keys directly under SOFTWARE\…

reg import file.reg /reg:64

There are other approaches to this but my solution works and is the fastest in my opinion.

When an Exchange Online user has access to a shared mailbox through full access permissions, he can reply on behalf of that address. The problem is that, by default, emails sent as the shared mailbox are saved in the user’s main mailbox instead of the delegated mailbox. To fix that you have 2 options:

Option 1: Use Exchange Online Powershell

For emails sent as the shared mailbox (Full Access)

Set-Mailbox <shared mailbox> -MessageCopyForSentAsEnabled $true

For emails sent on behalf of the mailbox (Send On Behalf)

Set-Mailbox <shared mailbox> -MessageCopyForSendOnBehalfEnabled $true

Option 2: Registry

HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\Preferences

DWORD DelegateSentItemsStyle 1

Note! Outlook must be configured to run in cached mode, otherwise mails will get stuck in the Outbox.

References:

https://learn.microsoft.com/en-us/exchange/troubleshoot/user-and-shared-mailboxes/sent-mail-is-not-saved