Hi, thanks for checking in. Believe it or not, it is very common for people who ask a genealogy question to abandon their own thread and never read the answers and replies. Since I was having "technology" issues, I really didn't want to wrestle with this unless you were still out there. Glad to hear from you, you are a gem!, and the digital archives is now working for me, and ....
I found it!
See #16, bottom of left hand page, 1846 marriage:
Møre og Romsdal fylke, Tingvoll, Ministerialbok nr. 586A10 (1844-1856), Ekteviede 1846, side 330. http://www.arkivverket.no/URN:NBN:no-a1450-kb20050615010543....
28 June 1846
Ungkarl/bachelor Ole Olsen Indergaard
pige/maiden Berret Pedersdatter Gaupsæt (? hard to read)
his father: Ole Knudsen Indergaard
her father: Peder Pedersen
So that nicely identifies your Ole Olsen b 1817 as indeed the same as the candidate you found.
This might be the birth of Ole Olsen Indergaard b 1817, see left hand page, top right entry, very hard to read:http://www.arkivverket.no/URN:NBN:no-a1450-kb20070913680074....
Møre og Romsdal fylke, Tingvoll, Ministerialbok nr. 586A07 (1794-1819), Kronologisk liste 1817, side 327-328.
Here is the Family Search information you mentioned:https://familysearch.org/pal:/MM9.2.1/MZW7-ZLZ
The farm name can change, but this can still be the same person.