GG5: 納得のいく説明 a convincing explanation
納得のいく答えをもらうまでここを動きません． I'm not going to budge from here until I get a satisfactory answer.
回は十分納得のいく仕事ができたと思う． I'm quite pleased by the work I did this time.
Eijiro:
納得のいく {形} : satisfactory
得のいくように {副} : convincingly
納得のいく証拠なしに : without convincing proof
誰もが納得のいく唯一の選択 : only choice acceptable to all
Reverso is mostly satisfactory/convincing

Seems always pre-nominal.

@@ -15,4 +15,4 @@
-<pos>&v5k-s;</pos>
-<gloss>to accept (e.g. an explanation)</gloss>
-<gloss>to be satisfied (with)</gloss>
-<gloss>to assent (to)</gloss>
+<pos>&adj-f;</pos>
+<gloss>satisfactory</gloss>
+<gloss>convincing</gloss>
+<gloss>acceptable</gloss>

Copied from entry 2203620 (納得が行く)

Google N-gram Corpus Counts
╭─ーーーーーーー─┬─────────╮
│ 納得のいく　　 │ 457,255 │
│ 納得の行く　　 │  58,985 │
│ なっとくのいく │   1,097 │
├─ーーーーーーー─┼─────────┤
│ 納得がいく　　 │ 113,309 │
│ 納得が行く　　 │  12,323 │
│ なっとくがいく │     241 │
╰─ーーーーーーー─┴─────────╯

I suspect this is mostly used prenominally. Might be better to gloss it like an adjective.