@Boppersnr1
I have built a flow that will cover what you need
Step 1: Trigger
Step 2: Check if the regarding is an account
Step 3: Get the Account
Step 4: Update the address 1 field to the description on the appointment
I have added this to a scope action, if you copy the below to your clipboard
{"id":"c651e474-bc0c-4620-9856-b3e035e97c11","brandColor":"#8C3900","connectionReferences":{"shared_commondataserviceforapps":{"connection":{"id":"/new_sharedcommondataserviceforapps_64bc3"}}},"connectorDisplayName":"Control","icon":"data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMzIiIGhlaWdodD0iMzIiIHZlcnNpb249IjEuMSIgdmlld0JveD0iMCAwIDMyIDMyIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPg0KIDxwYXRoIGQ9Im0wIDBoMzJ2MzJoLTMyeiIgZmlsbD0iIzhDMzkwMCIvPg0KIDxwYXRoIGQ9Im04IDEwaDE2djEyaC0xNnptMTUgMTF2LTEwaC0xNHYxMHptLTItOHY2aC0xMHYtNnptLTEgNXYtNGgtOHY0eiIgZmlsbD0iI2ZmZiIvPg0KPC9zdmc+DQo=","isTrigger":false,"operationName":"Scope","operationDefinition":{"type":"Scope","actions":{"Condition":{"type":"If","expression":{"equals":["@triggerOutputs()?['body/_regardingobjectid_type']","accounts"]},"actions":{"Get_a_row_by_ID":{"type":"OpenApiConnection","inputs":{"host":{"connectionName":"shared_commondataserviceforapps","operationId":"GetItem","apiId":"/providers/Microsoft.PowerApps/apis/shared_commondataserviceforapps"},"parameters":{"entityName":"accounts","recordId":"@triggerOutputs()?['body/_regardingobjectid_value']"},"authentication":"@parameters('$authentication')"},"runAfter":{},"metadata":{"operationMetadataId":"a7b4d094-8d38-4177-8252-6bab88324911"}},"Update_a_row":{"type":"OpenApiConnection","inputs":{"host":{"connectionName":"shared_commondataserviceforapps","operationId":"UpdateRecord","apiId":"/providers/Microsoft.PowerApps/apis/shared_commondataserviceforapps"},"parameters":{"entityName":"appointments","recordId":"@triggerOutputs()?['body/activityid']","item/description":"Customer Address:\n@{outputs('Get_a_row_by_ID')?['body/address1_composite']}"},"authentication":"@parameters('$authentication')"},"runAfter":{"Get_a_row_by_ID":["Succeeded"]},"metadata":{"operationMetadataId":"cb5a23ab-908c-4a33-915b-49492c031a8c"}}},"runAfter":{},"metadata":{"operationMetadataId":"15b77eda-7bc1-4351-8cdf-0eacd18f8eaf"}}},"runAfter":{}}}
then go to flow and press add an action, then select clipboard, followed by Ctrl + V it should display and can be added straight into your flow (you will still need to add the trigger)
Hope this helps!
