Reference:
https://docs.microsoft.com/en-us/microsoftteams/microsoft-teams-online-call-flows

Topic 3,
Overview

The office in Calgary has a 1 -Gbps internet circuit. The offices in San Diego and New York have 100-Mbps internet circuits. The field site in Edmonton has a 3-Mbps internet circuit.
* Information technology (IT)
* Project management
* Marketing
Azure AD has the default Cross-tenant access settings configured.
The Teams policies settings are configured as shown in the following exhibit

The Teams client is deployed to a non-persistent Virtual Desktop infrastructure (VDI) used by the project management department.
Allow guest access in Teams is set to Off.
The Microsoft Viva Connections app is deployed to all users.
* An executive at the San Diego office reports that video drops during Teams meetings.
* The Edmonton field site has limited bandwidth, and users report poor audio during Teams calls and meetings.
* Users in the project management department report that they cannot give or take control during Teams calls and meetings while sharing their VDl desktop.
* Configure the media bit rate settings for the users at the Edmonton field site. The settings must apply only to the users while they are at the site, but NOT when they are at a different office.
* Create a Teams channel to enable the project management department to collaborate with the IT department on a device upgrade project.
* Implement a pilot rollout of Operator Connect for the users in the New York office. A port request was accepted already.
* Create a Teams channel for the marketing department for external collaboration.
* Rename the Viva Connections icon as Start portal.
* The marketing department requires that all the files shared by using Teams remain available for at least three years after deletion.
* The marketing department must be able to apply a watermark to content and video shared dunng Teams meetings.
* All users require indefinite access to training videos recorded in Teams by the IT department
* All access to Teams and shared resources must use the principle of least privilege.
* Guest access must remain disabled.

See thesolution in the explanation below
Explanation:
To add a disclaimer to all Teams meeting invites, you can use the Exchange admin center to create a mail flow rule that applies the disclaimer to meeting requests. Here are the steps to follow:
Sign in to the Exchange admin center with your Microsoft 365 username and password1.
In the left navigation, go to Mail flow > Rules.
Click Add (+) and then select Create a new rule.
In the New rule pane, enter a name for the rule, such as "Meeting disclaimer".
Under Apply this rule if, select A message header includes any of these words.
In the Specify header name box, enter X-MS-Exchange-Calendar-Meeting-Request. This is a special header that identifies meeting requests2.
In the Specify words or phrases box, enter True. This means that the rule will apply to any message that has the header set to True.
Click Add and then OK.
Under Do the following, select Append the disclaimer.
In the Specify disclaimer text box, enter the disclaimer text that you want to add to the meeting invites, such as:
Disclaimer: This meeting may be recorded for quality and training purposes.
Click Enter text and then OK.
Under Choose a mode for this rule, select Enforce.
Click Save.
Now, when you or anyone in your organization schedules a Teams meeting, the disclaimer will be added to the meeting invites automatically.