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You can restore the DualShield IIS Agent settings in 2 ways, manually or by a PowerShell script.
Manual
This has to be done on every IIS node that is enabled with DualShield 2FA. Let's use OWA as an example. In the IIS Manager, navigate to the OWA node:
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Repeat the above work on every node that's been affected.
PowerShell Script
On the Exchange CAS server, launch a PowerShell window, navigate to the folder:
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