Windows Defender has a Real-time protection setting that will cause Datalink sync times to increase to several minutes. A typical full sync should take no longer than 45-90 seconds.

To turn off the real-time protection follow these steps:

  1. Open Windows Defender Security Center

  2. Click on Virus & threat protection

  3. Click on Virus & threat protection settings

  4. Switch the Real-time protection setting to Off 

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