Maybe I misread, in a few docs they say “Excel 2016 and up”, “Office Excel 365” supported now. But perhap’s its just a better compatibility for BAQs?
REST v2
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REST Service Root URL has changed the format to include the current Company. The /api/v1/ segment of the request URL has been replaced with /api/v2/odata/.
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The format of Business Activity Queries (BAQs) data requests has changed to include /Data in the request URL. This is critical for enabling REST API compatibility with Microsoft® Excel® 2016/365. Refer to the BAQ Feeds topic of this guide for detailed information and examples (Display Data in OData Applications Display in Excel Table).
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Atom XML format is no longer available for both input and output. OData v.4 standard does not support it, which means that OData v4 infrastructure libraries do not provide such functionality.
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The formats of the $expand and $select OData parameters on expanded entity subsets, row counting, etc. have also been changed in compliance with the latest OData standards. You can find more details on this in the OData Parameters topic of this guide or on the official OData website.
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By default, a valid API Key is a required parameter for every request to the REST API and must be specified either in a request header or as a custom querystring parameter. Refer to the API Key Maintenance section of the Application Help for details on API Keys.
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Locale, Language, and Plant (erp.plant) can now be specified as custom query parameters in the request URLs. Previously, they could only be added to request headers.