Use Your Synology NAS for Microsoft 365 Backups

Written by James McDonald

November 10, 2020

Install the Microsoft 365 Backup App on your Synology

Create the Azure AD Registered App that will allow the backup to connect with the correct permissions using the provided how-to from the following link:

https://www.synology.com/en-global/knowledgebase/DSM/tutorial/Backup/How_to_register_an_Azure_AD_app

In Active Backup for Microsoft 365. Create a backup task. Make sure to select what you need to backup and avoid the possible cruft of dead and unused accounts and services.

Troubleshooting

I had a problem with the AppGenerator.ps1 script failing to create the credentials in Azure (see error message below) so I added a sleep command to allow the script to pause for a bit to wait for the missing resources to make their appearance.

However before I did the above I deleted the app several times in Azure AD registered apps and one time it worked with out the above work-a-round

Error Message of Failed .\AppGenerator.ps1 Run

PS C:\Users\JamesMcDonal_pt0ydur\OneDrive - Toggen\Toggen\Backup Solution\Synology> .\AppGenerator.ps1

Untrusted repository
You are installing the modules from an untrusted repository. If you trust this repository, change its
InstallationPolicy value by running the Set-PSRepository cmdlet. Are you sure you want to install the modules from
'PSGallery'?
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "N"): Y
Before generating your Azure AD application, please enter a password you wish to use to protect the certificate: ************
[INFO] Creating the client application (Microsoft 365 Backup)
New-AzureADApplicationKeyCredential : Error occurred while executing GetApplication
Code: Request_ResourceNotFound
Message: Resource 'c6d99636-7bea-4085-a65a-74d185b1c2c3' does not exist or one of its queried reference-property
objects are not present.
RequestId: 8a28c8ba-4e53-48c3-94d8-9694213deea8
DateTimeStamp: Sun, 08 Nov 2020 22:30:27 GMT
HttpStatusCode: NotFound
HttpStatusDescription: Not Found
HttpResponseStatus: Completed
At C:\Users\JamesMcDonal_pt0ydur\OneDrive - Toggen\Toggen\Backup Solution\Synology\AppGenerator.ps1:134 char:29
+ ... edentials = New-AzureADApplicationKeyCredential -ObjectId $clientAadA ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [New-AzureADApplicationKeyCredential], ApiException
    + FullyQualifiedErrorId : Microsoft.Open.AzureAD16.Client.ApiException,Microsoft.Open.AzureAD.Graph.PowerShell.Cus
   tom.NewAzureADApplicationKeyCredential

Get-AzureADApplicationOwner : Error occurred while executing GetApplicationOwners
Code: Request_ResourceNotFound
Message: Resource 'c6d99636-7bea-4085-a65a-74d185b1c2c3' does not exist or one of its queried reference-property
objects are not present.
RequestId: 462526bb-6fac-4bcb-a9f1-a238f15d5f4e
DateTimeStamp: Sun, 08 Nov 2020 22:30:27 GMT
HttpStatusCode: NotFound
HttpStatusDescription: Not Found
HttpResponseStatus: Completed
At C:\Users\JamesMcDonal_pt0ydur\OneDrive - Toggen\Toggen\Backup Solution\Synology\AppGenerator.ps1:142 char:14
+ ...    $owner = Get-AzureADApplicationOwner -ObjectId $clientAadApplicati ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Get-AzureADApplicationOwner], ApiException
    + FullyQualifiedErrorId : Microsoft.Open.AzureAD16.Client.ApiException,Microsoft.Open.AzureAD16.PowerShell.GetAppl
   icationOwners

Add-AzureADApplicationOwner : Error occurred while executing AddApplicationOwner
Code: Request_ResourceNotFound
Message: Resource 'c6d99636-7bea-4085-a65a-74d185b1c2c3' does not exist or one of its queried reference-property
objects are not present.
RequestId: bf855c05-613b-41cb-b33b-468bc7989568
DateTimeStamp: Sun, 08 Nov 2020 22:30:27 GMT
HttpStatusCode: NotFound
HttpStatusDescription: Not Found
HttpResponseStatus: Completed
At C:\Users\JamesMcDonal_pt0ydur\OneDrive - Toggen\Toggen\Backup Solution\Synology\AppGenerator.ps1:144 char:9
+         Add-AzureADApplicationOwner -ObjectId $clientAadApplication.O ...
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Add-AzureADApplicationOwner], ApiException
    + FullyQualifiedErrorId : Microsoft.Open.AzureAD16.Client.ApiException,Microsoft.Open.AzureAD16.PowerShell.AddAppl
   icationOwner

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