Local AD group membership not syncing to O365

Issue: This is a very common issue that when you add hybrid users to hybrid groups in Local AD, the group membership for the users does not reflect on O365.

Resolution: Run force initial sync to resolve the issue. Below are the steps to do so:

1. Run PowerShell as Administrator on the server where the AD Connect is installed.

2. Run the following command:

Import-Module ADSync

3. Run the following Command

Start-ADSyncSyncCycle -PolicyType Initial