In the mobile application: 

For iOS devices:

1. Open the Zoho One app on your mobile device, then tap in the bottom right corner.
   
2. Tap  at the bottom, then tap CREATE GROUP.
3. Tap Collaboration Group, then enter the Group name, Group email, and Group description.
   
4. Tap Next, then add Moderators and Members to the group.
   
5. Moderators of the group can add or remove users and manage group settings.
   
6. Members of the group don't have any additional preferences.
   
7. Tap Add.
   

Note: For the field Group email to be enabled, make sure your domain has to be verified. Click here to know how to verify a domain.

For Android devices:

1. Open the Zoho One app on your mobile device.
   
2. Tap at the bottom, then tap CREATE GROUP.
   
3. Tap Collaboration Groups, then enter the Group Name, Group Mail, and Group Description.
   
4. Tap Next, then add Moderators and Members to the group.
   
1. Moderators of the group can add or remove users and manage group settings.
   
2. Members of the group don't have any additional privileges.
   
5. Tap ADD.