New answers tagged feature-service
I found the answer while using Wireshark to look at the web request being sent to ArcGIS server. It never sent any attribute updates, until I put the fields I tried to update into table.OutFields..
Slightly different process for ArcGIS 10.2: under Environment Settings, disable the M-values under M Values-->Output has M Values-->Disabled.Then run the Feature Class to Geodatabase or Copy Features tool. Same process for removing Z-aware, but Z-values-->Output has Z Values-->Disabled.
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