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Truncate Exchange Database Log files without backing up

July 23, 2022 by AJNI No Comments

A good backup tool uses VSS Writers to achieve application consistent backups, which also truncates transaction log files. You can also achieve that without having to do a backup. Here are the few commands:

diskshadow

You can add multiple volumes, if database and log files are located on different disk drives:

add volume D:

add volume E:

begin backup

create

end backup

Reading time: 1 min

Always On VPN Clients authentication prompt when trying to access SYSVOL

July 6, 2022 by AJNI No Comments

If users are getting an authentication prompt when accessing domain resources through Always On VPN, make sure that Domain Controllers have the appropriate digital certificates. The certificate must have KDC Authentication, Smart Card Logon, Server Authentication and Client Authentication in the Enhanced Key Usage (EKU) field. The pre-existing Kerberos Authentication can be duplicated and used as a baseline template for the certificates.

References:

https://directaccess.richardhicks.com/2019/05/20/always-on-vpn-clients-prompted-for-authentication-when-accessing-internal-resources/

Reading time: 1 min

Simple fix for Microsoft Azure AD Sync Service not starting after a reboot

by AJNI No Comments

Have you been having issues with Microsoft Azure AD Sync service after a simple reboot of the Windows Server? These simple steps might help:

Copy model.mdf and modellog.ldf files from

C:\Program Files\Microsoft SQL Server\150\LocalDB\Binn\Templates

to either

C:\Users\ADSyncxxxxx$\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\ADSync2019

or

C:\Windows\ServiceProfiles\ADSync\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\ADSync2019

This issue should not occur starting from version 2.1.1.0 of MS Azure AD Connect. Read the Microsoft doc below to perform a manual in-place upgrade of Azure AD Connect.

References:

https://www.reddit.com/r/sysadmin/comments/rxkd7m/has_your_azure_ad_connect_been_unable_to_start/

https://docs.microsoft.com/en-us/azure/active-directory/hybrid/how-to-upgrade-previous-version#in-place-upgrade

Reading time: 1 min

Reconnect a soft deleted Exchange Online mailbox to another account

June 29, 2022 by AJNI No Comments

In Microsoft 365 / Exchange Online, to connect a soft deleted mailbox, you have need to use the cmdlet New-MailboxRestoreRequest to restore the mailbox to another user.

Get-Mailbox -SoftDeletedMailbox | select guid

Get-Mailbox <NewMailbox> | select guid

New-MailboxRestoreRequest -SourceMailbox <GUID> -TargetMailbox <GUID of new mailbox> -AllowLegacyDNMismatch

To check the status of the restore:

Get-MailboxRestoreRequest | Get-MailboxRestoreStatistics

References:

Reddit

Reading time: 1 min

Remote Desktop Services session freeze with Windows 10/11 Clients

June 1, 2022 by AJNI No Comments

If you are noticing seemingly random RDS session freezing on Windows 10/11 clients, this registry key might help. It disables the UDP protocol for RDP connections, which Microsoft enabled by default since Windows 10 1809/1909. I have had this issue occur on Windows 10 21H2.

HKLM\Software\Policies\Microsoft\Windows NT\Terminal Services\Client

DWORD fClientDisableUDP 1

A reboot of the machine was not needed, after closing the RDP session and reconnecting, TCP was being used. You can check which protocol is being used by clicking the symbol at the top:

References:

https://www.michaelmaw.com/how-to-fix-remote-desktop-freezing/

https://community.spiceworks.com/topic/2269433-remote-desktop-randomly-freezes-up

Reading time: 1 min
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