If you want the episode legally, it’s available on Peacock, Amazon Prime, iTunes, Netflix (region-dependent), and DVD/Blu-ray. If you want just the audio, you could legally record it from your own copy for personal use.
The search for "The Office S01E03 WMA" also represents a shift in how we consumed media. In 2005, NBC aired the episode on March 29. If you missed it, you had to wait for a rerun or a DVD release. The "WMA/WMV" file was the bridge between scheduled programming and the on-demand future. the office s01e03 wma
The episode you are likely looking for is (Season 1, Episode 3) of the US version of The Office If you want the episode legally, it’s available