In August 2020 Microsoft implemented a change for all new Microsoft 365 tenants. The change has impacted all third-party applications (including those built in-house) like Encodian whereby 'Custom App Authentication' is disabled by default, thus the application cannot be installed.
If you experience an issue installing the 'PDF Converter for SharePoint Online' application please follow these steps:
1. Install the latest version of the SharePoint Online Management Shell. We have tested the following steps with the latest published version (16.0.21012.12000) released on 8th March 2021.
2. For further guidance on how to install and work with the SharePoint Online Management Shell please review this article.
3. Launch 'Windows PowerShell'
4. If you do not authenticate with multi-factor authentication (MFA): Run the following command at the SharePoint Online Management Shell command prompt to connect to your SharePoint Online tenant:
Connect-SPOService -Url https://contoso-admin.sharepoint.com -Credential admin@contoso.com
Replacing the highlighted text with the relevant entries, for example:
Connect-SPOService -Url https://encodiandemo-admin.sharepoint.com -Credential support@encodian.com
If you do authenticate with MFA: Run the following command at the SharePoint Online Management Shell command prompt to connect to your SharePoint Online tenant:
Connect-SPOService -Url https://contoso-admin.sharepoint.com
Replacing the highlighted text with the relevant entries, for example:
Connect-SPOService -Url https://encodiandemo-admin.sharepoint.com
5. Run the following command to apply the required change:
Set-SPOTenant -DisableCustomAppAuthentication $false
Please note that the change can take up to 60 minutes to take effect.
6. To verify the change, run the following command:
Get-SPOTenant
If you continue to experience issues please submit a support request.
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