
Hi @Roth, Lars ,
We understand your situation. In fact, SPO is not a public site. As you may know, the password and expiration are set for security reasons.
You could set the expiration time to be longer, which increases security and does not require updating links in a short period of time or set it never expire.
For more information, please refer to Manage sharing settings.
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Go to SharePoint Admin center to change the settings:
After changing to a longer time, you can see that the default expiration time has increased:
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