The Microsoft Excel Online connector is a Palantir-provided driver connector. The official documentation for this driver can be found here ↗.
Networking
If using an agent connection, the agent must be allowed to connect to the system you choose. This means that the agent must be able to reach the destination IP address, and the destination system must be configured to allow connections from the agent.
If using a direct connection, be sure to add the following egress policies to the connector:
Domain
Required
<Server>
Always. For Exchange Online, use Server='https://outlook.office365.com/EWS/Exchange.asmx'
outlook.office365.com
Only if Platform=Exchange_Online AND Schema=EWS
graph.microsoft.com
Only if Platform=Exchange_Online AND Schema=MSGraph
login.microsoftonline.com
Only if Platform=Exchange_Online (default) AND AuthScheme=AzureAD, AzureServicePrincipal, or AzureServicePrincipalCert
<KerberosKDC>:88
Only if AuthScheme=Negotiate
<KerberosServiceKDC>:88
Only if AuthScheme=Negotiate AND Kerberos topology uses multiple realms