# Add or Update Phone Call Activity

While a call is in progress, you can capture what the conversation is about, tie it to the right contact, and link it to related Dynamics 365 records. The activity is written back to Dynamics 365 so nothing about the call is lost once you hang up.

## Log the call details

1. On the active call, select **Phone Call Activity** to bring up the "Phone Call Activity" page.

   :::note
   When [Open "Phone Call Activity" Page When Entering a Call](/pbx/integrations/dynamics-365/set-up-phone-call-activity-creation/#set-up-phone-call-activity-creation__1) is turned on, this page appears on its own as soon as the call connects.
   :::

   ![Call control showing the Phone Call Activity option](/images/pbx/manually-open.png)

2. Fill in or adjust the call details.

   ![Phone Call Activity form with fields for subject, contact, description, and related records](/images/pbx/add-call-activity-information-1.png)

   - **Subject**: Give the call a short title.
   - **Call From**: Shows the Dynamics contact that matches the caller's number.

     :::note
     - When several contacts share the number, pick the right one from the drop-down.
     - When nothing matches, select **Add** to store the number as a new Dynamics contact.

       ![Dialog for saving an unmatched number as a Dynamics contact](/images/pbx/add-dm-contact.png)
     :::

   - **Description**: Write out the details of the conversation.
   - **Regarding**: Type a keyword and press **Enter** to look up matching Dynamics 365 records, then choose the records you want to attach to the call.

     :::note
     Search currently covers only the **Topic** field of **Opportunities**.
     :::

3. Select **Save**.

4. Select ![Close](/images/pbx/close-window.png) to dismiss the page.

   :::caution
   Save before you close. Closing the page discards any details you entered but did not save, and the call will not be logged in Dynamics 365.
   :::

## Result

The call activity is saved to Dynamics 365 and linked to the contact and record you chose.

![Completed phone call activity as it appears in Dynamics 365](/images/pbx/phone-call-activity-result.png)