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Azure AD Connect Installation that Stopped Working After Reboot

Azure AD Connect Installation that Stopped Working After Reboot

Hybrid Id, the marriage among Active Listing and Azure Advertisement, has benefitted from numerous enhancements in Azure Ad Connect. For the huge the vast majority of corporations with Hybrid Id, Azure Ad Link supplies the synchronization portion of the Hybrid Identity tale and can also perform a very important position in the authentication aspect of it.

With the Azure Advertisement Link v2 launch in July 2022, Microsoft took its free of charge synchronization solution to the subsequent level, at minimum in terms of software program compatibility. Azure Advert Hook up v2’s SQL Server 2019-dependent LocalDB answer changed Azure Advertisement Connect v1’s SQL Server 2012 SP4-based LocalDB solution and is additional secure, better accomplishing and also will make Azure Advertisement Link completely ready for the future pair of years.

Having said that, the LocalDB solution also produced Azure Ad Connect installations go stomach up the final few of months . . . .

About the past handful of months, I have been having messages from admins whose Azure Advertisement Hook up installations stopped performing after setting up the latest Home windows Server cumulative update. I have dug into lots of of these installations, only to come across that the Azure Advert Join-managed LocalDB answer could not start off any longer just after any reboot Azure Advertisement Hook up did not split since of the every month cumulative update the update was basically the result in for the reboot.

Frequent results in ruled out

There are quite a few widespread brings about why Azure Advertisement Hook up stops working and/or is no longer supported:

  • The LocalDB instance has grown much larger than 10 GB
  • There is inadequate RAM to get started the neighborhood DB instance
  • A Group Plan location is avoiding Azure Advert Hook up or its core factors from starting up
  • The Windows Server set up managing Azure Advert Link was upgraded in-spot
  • The service account’s permissions or account modified or the company account’s password expires or is altered (as these qualifications are made use of to connect to the database)

All these leads to were dominated out as the result in of why the individual scenarios of Azure Ad Join I investigated stopped operating.

What is more, Azure Advertisement Link staging method servers experienced the exact same destiny. Restoring Azure Ad Link from a preceding backup also did not assist, as Azure Ad Link would end operating at the next reboot. Microsoft’s alternative to uninstall and then reinstall Azure Advertisement Hook up simply alleviated the issue as a few of months down the highway the LocalDB instance would just refuse to start off yet again . . . “

Tests, testing . . . Is this thing on?

In demo environments, a couple of persons began investigating Azure Ad Hook up. This led to the comprehension that the lead to of the non-starting up LocalDB is corruption of the LocalDB instance’s product database. Didier van Hoye documented the getting in the most element.

In all conditions in which the concern was reproduceable, the very same two artifacts can be witnessed:

  1. In the mistake.log file, generally found at C:WindowsServiceProfilesADSyncAppDataLocalMicrosoftMicrosoft SQL Server Nearby DBInstancesADSync2019, the adhering to log traces can be browse:

    Mistake: 9903, Severity: 20, Condition: 1. The log scan quantity (x) passed to log scan in database 'model' is not legitimate. This error might show facts corruption or that the log file (.ldf) does not match the data file (.mdf). If this mistake transpired all through replication, re-produce the publication. In any other case, restore from backup if the problem success in a failure during startup.

  2. An celebration is logged in the Application log with Celebration ID 528:


    Party 528 with resource SQLLocalDB 15. Windows API phone WaitForMultipleObjects returned error code: 575. Home windows program error information is: Software Mistake The software was not able to begin properly (0x%lx). Click on Okay to shut the software. Described at line: 3714.

Microsoft also investigated the difficulty. With 30 million businesses making use of Azure Advertisement Join, this concern was also raised with them by admins at the close of their ropes.

The cause

The SQL crew at Microsoft have identified the root trigger of the situation. The concern is brought on by a program error in the backup logic that produces an inconsistent point out in the SQL Server product databases start out webpage.

After a backup happens, the design databases is established to Complete recovery mode (dbi_status == 0x40010000), and the dbi_dbbackupLSN (the log sequence number for the database backup) is set to a worth that details to a log file.

The precise restoration manner that is ruled by the learn database is Uncomplicated. In Easy restoration manner, databases logs are truncated routinely. In contrast, in Comprehensive restoration method, logs are truncated only soon after a backup.

When the LocalDB occasion is restarted following the log file is truncated, it detects a backup log sequence range which is before than the earliest log file. Hence, it will never get started the company.

The alternative

If you practical experience this difficulty, you can have your Azure Ad Hook up set up doing work again with these steps, making use of an elevated Home windows PowerShell:

  1. Quit the Microsoft Azure Advert Sync provider:

    Set-Assistance ADSync -StartupType Disabled

    Prevent-Service ADSync -force

  2. Duplicate in excess of the acknowledged-great model database template:

    Copy-Product "C:Program FilesMicrosoft SQL
    "C:WindowsServiceProfilesADSyncAppDataLocalMicrosoftMicrosoft SQL Server Local DBInstancesADSync2019"

    Copy-Item “C:Application FilesMicrosoft SQL
    “C:WindowsServiceProfilesADSyncAppDataLocalMicrosoftMicrosoft SQL Server Area DBInstancesADSync2019”

  3. Start the Microsoft Azure Advert Sync services:

    Set-Services ADSync -StartupType Computerized
    Start out-Assistance ADSync

The locale of Azure Advertisement Connect’s provider profile ("C:WindowsServiceProfilesADSyncAppDataLocalMicrosoftMicrosoft SQL Server Nearby DBInstancesADSync2019") could be unique in your situation. The higher than services profile is for a Microsoft Azure Ad Sync company that operates as the NT SERVICEADSync digital company account (vSA). This is the default account to run the provider. If you run the provider as an additional account or as a group Managed Service Account, modify the account identify in the services profile location previously mentioned.

To no more time knowledge this situation, update Azure Advert Join to version 2.1.1., as the Azure Ad Join workforce have additional logic to this version of Azure Ad Join to reduce the situation from happening.

Lively Directory Checking and Reporting

Energetic Directory is the basis of your Hybrid Identification, and the construction that controls accessibility to the most crucial resources in your corporation. The ENow Active Directory Monitoring and Reporting resource uncovers cracks in your Lively Listing that can trigger a protection breach or poor conclude-person expertise and enables you to speedily establish and clear away end users that have inappropriate accessibility to privileged groups (Schema Admins, Domain Directors). While ENow is not an auditing computer software, our reports lessen the total of do the job expected to cover HIPAA, SOX, and other compliance audits.