I need to use @font-face feature and my fonts are in OTF/TTF format and Microsoft browsers support only EOT format. I tried to use Microsoft tool WEFT, but it didn't work or I didn't understand how it works. Is there any other way to convert my fonts to EOT format?
Use the Font Squirrel Generator - this will produce not just EOT, but also SVG and WOFF formats, and converting multiple font files at once, and providing everything in a single archive along with the relevant CSS.