The events present in your Zoho CRM account can be synced and managed from Microsoft Office 365. Further, any event that you add in your Microsoft Office 365 account will be automatically captured in Zoho CRM. 

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Permission required:

1. To enable Microsoft sync in your CRM, you should have the profile-level permission. Contact the respective admin to enable sync permissions for your profile.
2. By default, all system-defined (original) Administrator and Standard profiles have these permissions enabled.
   

​For more details, refer here

To enable synchronization of events and contacts

Note

1. If the User ID is the same for your Office 365 and Zoho CRM, the sync will be enabled immediately. If the Login User ID is different for Zoho CRM and Office 365, you have to sign in to your Office 365 account to enable the sync. This is required when you are enabling it for the first time.
   
2. Only events owned by the user (My Events) will sync with Office 365.
   
3. As part of initial synchronization, a maximum of 5000 events from Zoho CRM calendar will be synchronized with Office 365.
   
4. Events scheduled for a future date will be synced first followed by events that were recently closed.
   
5. Events that were imported into CRM will not be synchronized with Office 365. However, events that were created individually in Zoho CRM or updated in bulk (Mass update) will sync with Office 365.

Disable Events Synchronization

1. In your Zoho CRM account, click Marketplace > Microsoft.
   
2. In the Events section, click Disable.
   
   Calendar synchronization between Office 365 and Zoho CRM will now be disabled.
   Alternatively, you can also disable the synchronization by deleting the Zoho CRM Calendar in your Office 365 account.
   

Synchronize Zoho CRM Contacts with Office 365

You can synchronize Zoho CRM Contacts with Office 365 so that you can work with your contacts efficiently from either place, without having to switch between the two applications. Contacts synchronization can be enabled by any user in Zoho CRM between his/her Zoho CRM account and Office 365 account. Once the sync is enabled, only contacts owned by the user will sync with Office 365.

To enable Zoho CRM Contacts synchronization with Office 365

1. In your Zoho CRM account, click Settings > Setup > Marketplace > Microsoft.
   
2. Under the Contacts section, click Enable.
   
   
   
   
   
3. In the Configuration popup, map the Microsoft fields with that of Zoho CRM. A default mapping is already available - you may edit it if required.
   
   
4. Select the checkbox to delete Zoho CRM Contacts when it is deleted in Office 365.
   Note that the Microsoft Contact fields unsupported via APIs will not be available for mapping in this Configuration pop up.
   Contacts synchronization between Office 365 and Zoho CRM will now be enabled. You will see a Zoho CRM Contacts folder in your Office 365 account.
   
   

Contacts that you create in either application will now synchronize with each other. Note that the synchronized contacts will be seen in the Zoho CRM Contacts and not the other contacts.

To disable the Zoho CRM Contacts synchronization with Office 365

1. In your Zoho CRM account, click Settings > Setup > Marketplace > Microsoft.
   
2. In the Contacts section, click Disable.
   
   
   
   Contacts synchronization between Office 365 and Zoho CRM will now be disabled.
   Alternatively, you can also disable the synchronization by deleting the Zoho CRM Contacts folder in your Office 365 account.

Note

1. When you disable the synchronization, the Zoho CRM Contacts folder will be deleted from Office 365. The contacts will however remain intact in Zoho CRM.
   

Invite users from Office 365

In this case, an administrator sends an invitation to an Office 365 user and the user in turn accepts the invitation.

To invite users from your Office 365 account

1. In your Zoho CRM account, click Settings > Setup > Users & Control > Users.
   
2. In the Users page, click Office 365 user.
   
   
   
   The New User option is used to invite a new user, who does not necessarily use Office 365, to your Zoho CRM account.
3. In the Add User popup, select the required user from the list and click Save. 
   
   
   
   An invitation email will be sent to the selected user.

To accept a Zoho CRM invitation

1. Click on the invitation link in the email you have recieved from your Office 365 account administrator.
   Alternatively, in your Office 365 account, browse for and click the Zoho CRM app from the Apps section
2. In the Zoho CRM login page, accept the terms and conditions to join your organization's CRM account.
   If you wish to associate an existing Zoho CRM account registered with another email address, click Associate My Account and log in using your existing Zoho CRM credentials. Please note that in this case, you will not join the account for which you have been sent an invitation, but the another Zoho CRM account of which you are already a part.

 Case #2: An Office 365 user requesting to join Zoho CRM

In this case, an Office 365 user requests the administrator to add him/her to the CRM account and the administrator approves the request.

To request to join your Zoho CRM organization account

If you have not been invited to join your organization's CRM account, but wish to join it, you can send a request to join the account.

1. In your Office 365 account, click the Apps icon.
   
2. Browse for and click the Zoho CRM app.
   In the Zoho CRM page, you will be informed that your organization already has a Zoho CRM account.
3. Click Request to Join.
   An email request will be sent to all users who have the Manage Users permission enabled in their Zoho CRM user profile.

To approve an Office 365 user's request to join your Zoho CRM account

1. Click on the approval link provided in the request email you have received from the Office 365 user.
   You will directly be taken to the Users section in Zoho CRM.
   Note that you will be able to add a user only if you have the Manage Users permission enabled in your Zoho CRM user profile.
2. In the Add New User popup, click Approve & Add. 
   The Office 365 user will now added as a Zoho CRM user.