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Remediation

From Azure Portal​

  1. In the Azure Portal, navigate to Microsoft Entra ID.
  2. Under Manage, click Security.
  3. Under Protect, click Conditional Access.
  4. Under Manage, click Named locations.
  5. Within the Named locations blade, click on IP ranges location.
  6. Enter a name for this location setting in the Name text box.
  7. Click on the + sign.
  8. Add an IP Address Range in CIDR notation inside the text box that appears.
  9. Click on the Add button.
  10. Repeat steps 7 through 9 for each IP range that needs to be added.
  11. If the information entered is for trusted ranges, select the Mark as trusted location check box.
  12. Once finished, click on Create.

From PowerShell​

Create a new trusted IP-based Named location policy:

[System.Collections.Generic.List`1[Microsoft.Open.MSGraph.Model.IpRange]]$ipRanges = @()
$ipRanges.Add("{{first IP range in CIDR notation}}")
$ipRanges.Add("{{second IP range in CIDR notation}}")
$ipRanges.Add("{{third IP range in CIDR notation}}")
New-MgIdentityConditionalAccessNamedLocation -dataType "#microsoft.graph.ipNamedLocation" -DisplayName "{{name of IP Named location policy}}" -IsTrusted $true -IpRanges $ipRanges

Set an existing IP-based Named location policy to trusted:

Update-MgIdentityConditionalAccessNamedLocation -PolicyId "{{ID of the policy}}" -dataType "#microsoft.graph.ipNamedLocation" -IsTrusted $true