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When setting -LegacyAuthProtocolsEnabled to False w/ Set-SPOTenant, would this also impact Apps / Add-Ins using Azure ACS for integration to SharePoint Online?
I know Azure ACS integration w/ SharePoint Online can be managed with -DisableCustomAppAuthentication but wanted to check if it classes CustomAppAuthentication as LegacyAuth and therefor would be blocked by the change to -LegacyAuthProtocolsEnabled?
My expectation for -LegacyAuthProtocolsEnabled was this only impacts anything using BasicAuth ... Is that correct or does LegacyAuth encompass more than just BasicAuth?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 82%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELZ%3C/text%3E%3C/svg%3E)
Thank you for your question.
We are currently looking into this issue and will give you an update as soon as possible.
Thank you for your understanding and support.
Hi @Jamie Brandwood,
Thank you for posting in this community.
Setting the LegacyAuthProtocolsEnabled to False with Set-SPOTenant will not impact apps or add-ins using Azure ACS for integration with SharePoint Online.
The LegacyAuthProtocolsEnabled property in SharePoint Online determines whether legacy authentication protocols are allowed. Legacy authentication refers to older methods of authentication, such as basic authentication.
The DisableCustomAppAuthentication property in SharePoint Online controls whether custom app authentication using Azure Access Control Service (ACS) app-only access tokens is allowed.
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Hi @Jamie Brandwood,
We have not received a response from you. Did the reply could help you? If the answer is helpful, please click "Accept Answer" and kindly upvote it. If it doesn't work, please let us know the progress. By doing so, it will benefit all community members who are having this similar issue. Your contribution is highly appreciated.
Hi @Jamie Brandwood,
Please kindly consider this comment as a warm follow up, I want to know if your problem has been solved. If the answer is helpful, please click "Accept Answer" and kindly upvote it. By doing so, it will benefit all community members who are having this similar issue. Your contribution is highly appreciated.
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Hi @Jamie Brandwood,
Is there anything else I can help with regarding this issue? You can comment us at any time and we will continue to follow up.
If the answer is helpful, please click "Accept Answer" and kindly upvote it.