Bing Uses rel=Next and rel=Prev For Discovery not for Merging Pages
Fresh controversy emerged on the fore with the Google’s noticing of the Bing’s denial to use rel=next/Prev. But it has agreed for using them for discovery and understanding of the site’s structure and not for merging the pages into the set according to Frederic Debut from Bing.

Bing Uses rel=Next and rel=Prev For Discovery not for Merging Pages2

Bing Uses rel=Next and rel=Prev For Discovery not for Merging Pages1
- Google’s Update
According to the recent update by the Google in Pagination with rel= Prev and rel=Next, one can now use these HTML link elements to indicate relation components URLs in a paginated series. The paginated content may be in any form be it component pages or forum threads divided into URL. If you choose rel= Prev and rel=Next markup on the component pages with the series, the Google interpret it as:
- Consolidate indexing properties, such as links, from the component pages/URLs to the series as a whole (i.e., links should not remain dispersed between page-1.html, page-2.html, etc., but be grouped with the sequence).
- Send users to the most relevant page/URL—typically the first page of the series.

Bing Uses rel=Next and rel=Prev For Discovery not for Merging Pages3
Exceptions:
Alongside the content you also offer view all page to the users as it is most preferred by the searchers. For implementing this function, you can see the below post: