Right now, we have raised this dispute with Microsoft and have requested to remove the flag for Writer domain in their sites. 

When the below page is displayed while you are trying to open Zoho Writer in Microsoft Edge, we suggest that you follow any one of the following options as a workaround. 

1. Use a different browser to access Zoho Writer (or)

2. Choose 'Continue to the unsafe site' option (make it as a safe site) and proceed (or)

3. Select 'Report that this site doesn't contain phishing threats' option and raise a dispute from your end as well. It will help to unflag/unblock the Writer domain from Microsoft sites at the earliest. 

Please refer this link to know about the Anti-Phising sites.