Last Refresh date/time from Power Service in Power BI Desktop report

Could you just create a custom column in Power Query and use:
DateTime.LocalNow()

#"Added Custom" = Table.AddColumn(#"Changed Type", "LastUpdate", each DateTime.LocalNow())

Then format it as DateTime

#"Changed Type1" = Table.TransformColumnTypes(#"Added Custom",{{"LastUpdate", type datetime}})

This should then show wich time the table was refreshed as it will update the column with current date and time.

M code:

let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUUpMSlaK1YlWMkJiGyOxTWDsWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Dummy = _t, Abc = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Dummy", Int64.Type}, {"Abc", type text}}),
#"Added Custom" = Table.AddColumn(#"Changed Type", "LastUpdate", each DateTime.LocalNow()),
#"Changed Type1" = Table.TransformColumnTypes(#"Added Custom",{{"LastUpdate", type datetime}})
in
#"Changed Type1"

Marius