Trident lets you stay productive even without an internet connection. When offline access is enabled, your emails are saved locally, so you can continue working as usual. Once the internet connectivity is restored, all your changes will be synced to the Zoho server.

Offline support is also available for calendar, notes, and tasks, regardless of the setting. Email attachments are not downloaded and stored locally as part of Trident's offline data. However, previously viewed email attachments may remain available for viewing while offline.

Most online actions are available offline. If you attempt an action that isn’t supported offline, you’ll either see an error message or your changes may revert to the last saved version.

Mail Offline Capabilities

Here's what to expect when you're offline:

• Your entire email history, except for archived emails, will be available if you've synced your mailbox for offline access.
  

• Attachments are only available offline if you previously opened or downloaded them while online.
  

Compose and Send Emails

• Draft emails and queue in Outbox (will be sent automatically when online) 
• Schedule and stop scheduled emails
• Delete emails in Outbox
• Modify and revoke SecurePass (changes will be reflected when online) 
• Insert signature and templates

Organizing emails

• Create, edit, and delete folders, subfolders, and tags
• Empty folders including Inbox, Spam, Trash, and others 
• Create templates

Managing emails 

• Move emails between folders
• Delete, archive, and print emails
• Mark emails as spam and not spam
• Tag and flag emails
• Snooze and set reminders
• Forward emails as attachments
• Add emails to tasks and filters
• Create events, tasks, and notes from selected email content

Search emails

• Search for emails 
• List emails by sender 
• Edit and delete saved search entities

Note: For searching and editing and deleting saved searches to work offline, the Offline Sync option must be on. Learn how to turn on or off Offline Sync here.

Configuring email settings

• Modify undo interval
• Set up read receipts for emails (will be activated when online) 
• Mount PST files

Calendar Offline Capabilities

• View events from enabled calendars and CRM records

Tasks Offline Capabilities

• Add, edit, and delete tasks
• Group and sort tasks
• Bulk edit tasks

Notes Offline Capabilities

• Create, edit, and delete notes

Contacts Offline Capabilities

• Create, edit, and delete contacts
• Search for contacts (works when all contacts are synced) 

Turn On or Off Offline Mode

By default, the Offline Mode will be enabled in Trident for all your Zoho Mail accounts, and it must be turned on manually for your POP and IMAP accounts. This can sometimes increase disk space usage. To manage this storage impact, you can turn off offline mode. 

To turn offline mode on or off from the account switcher:

1. Right-click the account for which you want to enable or disable offline mode.
2. Select Enable Offline or Disable Offline.  

You can also enable and disable offline access from the app settings by following the steps below:

1. Click your profile image in the top-right corner of the app. 
2. Select Settings from the menu list.
3. Select Accounts.
4. Hover over the Mail account for which you want to enable offline mode and click the More Options  icon that appears.
5. Select Enable Offline Mail or Disable Offline Mail from the menu list.

To enable or disable offline mode from the account details page:

1. Click open the account.
2. In the Sync Mail section, toggle the Enable offline sync option on or off.