When a user logs into their device, it contacts the domain controller for the latest GPOs. There are mandatory GPOs that will always be applied but some will not if a slow link is detected.
A slow link is when there is reduced bandwidth between the client and domain controller, for example when a client is connecting in via a dial up connection. The default threshold is 500kps, anything connection under this value then the client will only download and apply the mandatory GPOs.
Settings that are not downloaded when a slow link is detected include:
- Disk Quota
- Folder Redirection
- Software Installation
- Wireless Network (IEEE 802.11) Policies
- Wired Network (IEEE 802.3) Policies
- Internet Explorer Maintenance Extension
You can configure this threshold by setting the Computer Configuration/Policies/Administrative Templates/System/Group Policy/Configure Group Policy Slow Link Detection setting.
To force certain non-mandatory GPO settings to apply when a slow link is detected, Client Side Extensions (CSE) can be set to “Allow processing across a slow network connection”. These can be found in Computer Configuration/Policies/Administrative Templates/System/Group Policy/